I started learning japaness no long ago and I'm quite confused about two numbers
Seven and nine, I have learned that seven is shichi and that nine is ku
But I also know that seven is nana, and nine ...

Please go easy on me if this seems too basic and obvious, I'm a beginner.
I always had the impression that there were counters that went with the native Japanese numbers and counters that went with ...

Most people who've taken a Japanese 101 class know the 10 native Japanese numbers (一つ、二つ・・・十). It's always seemed odd that a system would stop at 10 when so many things in life need larger numbers. ...

I just wanted to make sure that my understanding is correct.
When saying Chapter 22, Act 22, or Episode 22 (basically parts of a larger piece), it normally starts with 第22 (or 第[number]) and then the ...

I recently created a web app called Kazu which aims to help speakers of Japanese and English learn to read numbers in both languages.
I found a web page which said that 'for numbers over 1万, "1000" ...

I'm confused about how to pronounce a word such as 一組. Are Japanese or Chinese numbers used when using 組 as a counter, and if the former how does it change phonetically?
For example, jisho.org lists ...

I've just started to learn Japanese, and I've been looking at the Joyo Kanji. Most of the words have On reading and Kun reading. I was wondering, which one is most popular and when should I use one ...

The reason why I ask this question is because of the pattern I've seen with Japanese numbers. Once you have to repeat a number to describe itself, you get a new unit. For example, 十十 = 百, 百百 = 万, 万万 = ...

I know that to say an hour and a half you can say 一時間半, but is it possible to express simply half an hour even though the counter comes before 半? Or would you just have to say 三十分?
If both ways are ...

I am still in a very early stage in learning Japanese, and just I have just learnt some numbers and my first counter words, such as the ones for telling time and まい.
Do you ever use "regular" numbers ...

So far I don't see any logic to it. It seems like it's just something you have to memorize, or is there a trick that I'm missing.
Update
To clarify, I'm not so much questioning the existence of the ...

I came across ０３年度 and ０９年度, and while the meaning is clear I didn't know the actual way of reading it. My first reaction was ゼロさんねんど, but I have no way of checking if that's right. I thought it might ...

One thing that always puzzled me was why some terms and names that are based on numbers will mix the on and kun readings. I never really understood the rules for that, but it occurs to me that there ...

I have some untranslated mangas that come in pairs of two, and each of them is labeled with 上 or 下 to denote which is the first volume and which is the second. I'm wondering if these labels are only ...

According to people I've asked, and this page, if I pay 20 Australian dollars for my meal, it seems I say ni ju doru (20-ドル), and that ni ju-en doru (20-えん-ドル) would be ungrammatical - "dollar" acts ...